Crushing machinery.



R. W. P-RINGLE.

I CRUSHING MACHINERY. APPLICATION men FEB. 2. 1911.

1,237,383. Patented Aug. 21,1917.

* v UNITED sTATEsEr TENtr OFFICE.

.RQIBEBT;WILLIAM =,PRI1$IGLE; or} sarcoma, sofu'rrinnu. neop asm, soirrn ArRioA,

ma m mages.

Toall 1.07pm?ii mayconccmwv Be itknown that l, ROBERT WILLIAM;

Pnmennyal subject of; the King-of Great] Britain and Ireland, residing atGatooma Southern Rhodesia, South Africa, mining engineer, ,have invented I certain newand useful Improvements in or Relating to tionbf coneshaped members, one attached Crushing Machinery, ing is a specification.

This invention relates to crushingmachinery; The objectof this invention is to of which the followprovi'de' an improved method of. 5-1 crushing stone, ore or other hard substance. and apparatus forcarrying thisLinto efliect,

Accordingto this invention I provide machine having an annular crushingchamber,-"the-walls of-wh1ch-areadapted to be" rotated in "a vertical'ams, in the same direction or in oppositedirections, at the same or at different speeds,

the distance between the walls of thefchamber being greatest at; or near, the top {and decreasing toward the;

bottom- The walls' for this purpose maybe The member forming the inner conical.

walls, referred to hereafter; as the inner or from time to time by a cam or other de vice, and allowed to drop; "Below the corn callmembers forming the annular chamber 1 arrange a device consisting of a combinato the outer conical; 1nuller,and revolving with itfthe other rotating with,-but-not at tached to, the vertical spindle, and, therefore not rising and fallingwith the inner cone,

The combination provides a parallel crushing chamber that is an annular conical sp ace with parallel sides and at the same time forms a; discharge spout for the crushed material. The width ofthe parallellcham her is capable of adjustment =bymeansfofa nut engaging a sleeve with a screwithread onitsouter surface,"

The particles to becrushed are fed into the" opening between the cones and are caught between thetapering walls.

Where the cones "rotatein opposite? directions the particles are immediately caused to rotaterapiclly around-their own and if one cone is traveling at a dither ent speed from the other the-particleis also compelledjto travel, around the sur face of the conical chamber. A grinding and disintegrating "efi'ect is set up, fresh faces of the particlebeing constantly exposed'gto'the grindingand crushing effect". K

re fi e n i tte s t nt IQatentedAug. 21,1917. Application filed malaise, 19.17. 1 Seria1No..146,1l5.

Where thetcones rotate in the same direc- I rotating cones.

The vertical. motion of the inner. cone 1 performs three. functions:

As the cone. risesit-tends to. make each. particle vfollow a slightly spiral path, up ward, until the opening between the cones becomesgreater than the diameter of the The particle then drops down to particle.

a lower position corresponding in width to the size otthe particle. 'l/Vl1en, thewinner;

cone has been raised to a predetermined eX-y tent and released by the cam or other dew vice it falls with a. crushing force on the The attrition due to rotation suc-F particle. ceeds this andthe process is repeated until the particle .reachesthe bottom of the an nular chamber where the walls are or may] be parallel and spaced apartsuch a;dis-

tance as to discharge material of thelsize required;

"An electro-magnetic device can be 'i ntro- I duced above the annular feed opening to catch any particles of steel which may by accident tobe fed in with the ore. This may suitably take the form of a softiron. ring attached to but insulated fromv the innerconeand revolvmg with it. This ring. is

magnetized by being wound with thin wire which'againis connected to a source OfLGlQC-J trical energy. T his maybe done by a hinged C'Oll,6( 3l101"&S 111 tramway work, pickingup energy fromairi ng attached to the framingv 1 electrified and insulated. The steel *thus pickednp can beautomatically brushed off, every revolution, by a brush or scraper attached tothe framing and arranged to. discharge thesteel collected into a suitable receptacle. p i i I Figure 1 of the drawing is a half elevation and-half section of one form of apparatus adaptedfor carrying out this inven tion.

Fig.2. is aside view of thelyoke and sleeve with cam. I p

3.1sra secti'onof an-alternative ar rangement for raising. the inner cone.

d is the'inner cone shaped 'muller, ending in a cylmdr1cal apron Z scovermg the top. of the lowercone shaped muller. 0. The outer cone shaped muller d is fitted so as to revolve concentrically to the inner cone a. This outer muller is attached to the annular gear wheel f which forms a parallel opening slightly larger than the aperture at the end of the upper cone shaped mullers aa nd d. g is the central spindle to which the 1n-,

ner cone is rigidly attached. 71, is the feed hopper. The gear wheel 7 is attached to the lower conical casing j which forms a flared extension of the outer muller. The gear wheel f caries a ball bearing runner guide 70.

The gear as shown is adapted to run the inner muller a and outer muller d in the same direction from the power shaft m through the bevel gear a 0, shaft 39 and gear wheels Q and 1". The spindleg is square in section where it passes through the sleeve 8 and also where it passes through the gear wheel 1. t is a cam, driven by a chain '0 off the main shaft m which lifts and releases the spindle a carrying the inner cone a. The bearing to in which the sleeve 8 works is attached to the main framing of the machine. 00 is the ball bearing track in which the outer cone revolves, arranged in such a way that the outer cone shaped muller can be withdrawn from the inner cone in two parts'for relming and repairs generally. This is effected by come bining two parallel tracks with the two cir-' cular tracks and arranging'points as in orin a similar manner to the upper track soas to facilitate the separationofthe two halves of the outer cone. 8 is a ball bearing track in the alternative arrangement sug gested in place .of the cam arrangement for lifting the spindle g. This track has an undulating surface by which the inner cone is caused to rise slowly and to drop suddenly, the process being repeated. 9 is the circular casting rigidly attached to the spindle g and forming the upper member of the ball bearing track 8. 10 is the lower member of the ball bearing track 8 and forms the base of the apparatus and carries the *dash pot arrangement for the end of the spindle. 11 is collar bearing on sleeve 8. A cone shaped adjusting nut 12 is threaded to engage with the sleeve 8 and arranged so that the. cone shaped muller a can be driven on to it in the same mannerthat a shoe is attached to the head of a stamp. The outer member of the lower crushing chamber j is attached to the gear wheel 7 and" therefore to the outer cone d and revolves with it.

stone ore would not .quired by a quartz ore.

sible to make it The inner Gone a is made hollow but reinforced withribs and is arranged tobe filled with shot or other heavy substance to increase the crushing blow. This can be regulated to suit the ore. Thus a lead and lime need the weight re- This arrangement also facilitates transport as the weight is only added at the mill site, after erection. The mill is also designed so that any one part; can be handled by animal transport on pac s.

WVith a machine made in this invention Y The power expended is proportional to the resistance of the tion.

Apartfrom overcoming frictional resistance of the machine the in crushing material and not in wearing out the faces of the machine.

No power is expended'in useless lifting of pebbles (as in tube mills) or pounding of material already crushed mills, tube mills, etc. are produced or in other words very, little material below that required in size is pro-.

accordance with 'duced. a e v The machine, in itself, affords a series of graduatedcrushings so that each particle when broken drops automatically to the zone where the annular space betweenthe cones corresponds to the particles then. size; until it finally reaches the lower par-,

allel chamber and is discharged. The dis,- tance between the faces of this lower chamber corresponds to the smallest space between the cones' in the upper annular chamber; and the chamber acts asa control to.

insure that particles greater in diameter than the size desired do not leave the machine.

Each particle when crushed to the size desired automatically proceeds to the next size and is finally discharged.

' Crushing is effected with the minimum of wateror altogether dry. This is achieved by keeping the particles continually revolving about their own axes, .thus preventing clogging. 3

Wear and tear is as uniform as it is posas the particles are caused to rotate around the periphery of the cone shaped chamber. I

The working parts are easily accessible. The converging cones can be arranged so that the-foot pounds ofenergy are greatest at the feed end (the base of the cones) and a minimum at the-discharge end; due to the decreasing peripheral speed and consequent decreasing power expended.

Theoretically particles of any size could be crushed and any size of product obtained by making the cones long enough. The machine however is intended primarily as an power is expended.

as in stamp Little orno slimes particle to disintegra-' avo alternative to tube ills, chum mills, and

similar fine crushers." Insmall plants it would come after the crusher (set to a small opening) to replace the stamp mill; 111 which position it would prove useful, producing a minimum of slimes.

Screens are obviously unnecessary as a particle cannot pass portant item often in mining) is far less than that required wherethe'discharge is effected. by splashing the crushed particle through the screen.

What I claim and Letters Patent is 2+- In crushing machines an mullerhaving a cylindrical extension at its desire to secure by inner conical smaller end, an outer conical muller having ,a cylindrical part and a flared extension at its smaller end, said mullers being disposed concentrically and vertically, the larger ends of the cones being uppermost, the distance between the cones being greatest at or near the top and decreasing toward the bottom,

a secondinner muller and adapted to be rotated with said inner muller, means of adto increase or decrease the space between said second inner muller and the flared end of the outer muller, and means for raising the first named inner muller and allowing it to fall periodically during rotation.

In witness whereof, I have hereunto signed my name in the presence of two subscriblng witnesses.

ROBERT WILLIAM PRINGLE.

Witnesses 'M. HARRISON, E. E. Owns.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, V

a t e pWashingtomD. 0;

, justing the said inner muller axially so as a 

